摘要
选取M22、M15和M23三种不同粒径中间相碳微球(MCMBs)作为填料,分别以10vol%、25vol%、40vol%和50vol%体积分数填充氰酸酯树脂(CE)制备了MCMBs/CE复合材料,通过SEM、XRD、拉曼光谱仪、导热仪、体积电阻仪分析了不同粒径的MCMBs/CE复合材料的性能。结果表明:三种球形粉体都具有石墨化结构,其中M22粉体球形度最好、石墨化程度最高(ID/IG=0.23)、体积电阻率最小。三种MCMBs粉体制备的MCMBs/CE复合材料的吸水性、导热性和导电性均随填充量的增加而增大,冲击强度则先增大后减小。其中以M22在40vol%填充率下所得MCMBs/CE复合材料的综合性能最优,吸水率为0.45%,冲击强度为23.6kJ/m2,热导率达1.28W/(m·K),体积电阻率达1.5Ω·cm。
The mesocarbon microbeads(MCMBs)with different size and fabrication process(M22,M15 and M23)were fabricated cyanate ester resin(CE)(MCMBs/CE)composites with volume fraction of 10 vol%,25 vol%,40 vol%and 50 vol%of MCMBs.The MCMBs/CE composites were characterized by SEM,XRD,Raman spectrum,thermal analyzer and resistance instrument.The results indicate that all the three spherical powders have the graphitization structure.Compared to M15 and M23,the M22 filler shows a regular spherical particle,the highest carbonization(ID/IG=0.23)and the lowest volume resistivity.The moisture resistance,thermal conductivity and electrical conductivity of the MCMBs/CE composites are enhanced with the increasing of fillers volume fraction.While,the impact strength of composites presents a marginal reduction with further increase in filler content.The MCMBs/CE composite achieves a low water absorption of 0.45%,a high impact strength of 23.6 kJ/m2,a high thermal conductivity of 1.28 W/(m·K)and a low volume resistivity of 1.5Ω·cm containing 40 vol% M22 filler.
引文
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